RFR: 8328146: Set LIBCXX automatically

Thu Mar 14 10:59:48 UTC 2024

We are adding LIBCXX to LIBS in calls to SetupJdkLibrary whenever LINK_TYPE is C++. We should do this automatically in SetupJdkLibrary for C++ linking.

I also removed the superfluous `-lc` from some places where it had been added.

-------------

Commit messages:
 - 8328146: Set LIBCXX automatically

Changes: https://git.openjdk.org/jdk/pull/18298/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18298&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328146
  Stats: 27 lines in 10 files changed: 8 ins; 4 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/18298.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18298/head:pull/18298

PR: https://git.openjdk.org/jdk/pull/18298